Eugex fischer



UNITED STATES EUGEN FISCHER, or HOCHST-ON-THE-MAIX, GERMANY, ASSIGNOR TOTHE,

PATENT OFFICE.

FAQRBYVERKE, "ORMALS MEISTER, LUCIUS BR'C'NING, OF SAliIE PLACEPRODUCTION OF PARANlT-ROBENZYLIDENE C HLQRIDE.'

SPECIFICATION forming part of Letters Patent No. 278,926, dated June a,1883. 7

Application filed January 23, 1888. lSpecimeus.)

To all whom, it may concern:

Be it known that I, Euom FISCHER, a cit-izen of the Empire of Germany,residing at Hochst-on-the-Main, Germany, have invented certain new anduseful Improvements in C01- oring-Matter, of which the following is aspecification;

My invention relates to the production of paranitrobenzylidene chloride,amaterial to be used in the manufacture of coloring-matters.

For carrying out my invention I proceed as follows: Pure andwell-crystallizing paranitrotoluol is heated in an oil bath to atemperature of 266 Fahrenheit, (130 centigrade,) and while graduallyraising the temperature to 320 Fahrenheit (160 centig1-ade').a currentof chlorine gas is passed in until the calculated amount has beenabsorbed. The mass resultiiig from the reaction is washed with water,dilute carbonate-of-soda solution, and again with water, and finally itis crystallized from alcohol. If it be desired to convert thisparanitrobenzylidene chloride into paranitrobenzalde- I \Vhat I claim asnew, and desire to secure by Letters Patent, is-

The new process of producing paranitrobenzylidene chloride, the sameconsisting intreat-ing paranitrotoluol to the action of a current ofchlorine gas at a high temperature,

washing the resulting mass with water and then with a solution of sodiumcarbonate, .and finally with water, treating the residue'with alcohol,and crystallizing the product therefrom.

In testimony whereof I have affixed my sig- 4o nature in presence of twowitfiessesi EUG, FISCHER.

- Witnesses:

A. S. HoGUE,

J. GRUND.

